//
//  UserAccount.swift
//  HMWeibo007
//
//  Created by TTang on 15/7/1.
//  Copyright © 2015年 shanyu. All rights reserved.
//

import UIKit

class UserAccount: NSObject ,NSCoding{
    /// 用于调用access_token，接口获取授权后的access token
    var access_token: String
    /// access_token的生命周期，单位是秒数(实际是数值！)
    var expires_in: NSTimeInterval
    /// 过期日期，应用程序创建者5年，普通用户3天
    var expiresDate: NSDate
    /// 当前授权用户的UID
    var uid: String
    /// 友好显示名称
    var name: String?
    /// 用户头像地址（大图），180×180像素
    var avatar_large: String?
    
    init(dict:[String:AnyObject]){
    
        access_token = dict["access_token"] as! String
        expires_in = dict["expires_in"] as! NSTimeInterval
        uid = dict["uid"] as! String
        //计算过期日期
        expiresDate = NSDate(timeIntervalSinceNow: expires_in)
    
    }
    
     /// 加载用户信息
    func loadUserInfo(finished:(account: UserAccount?,error: NSError?)->()){
       
         let params = ["access_token":access_token,"uid":uid]
        
         NetworkTools.sharedNetworkTools().GET("2/users/show.json", parameters: params, success: { (_, JSON) -> Void in
            
            let dict = JSON as! [String:AnyObject]
            self.name = dict["name"] as? String
            self.avatar_large = dict["avatar_large"] as? String
            
            // 目前的用户信息才是完整的
            // 保存用户信息
            self.saveAccount()
            finished(account: self, error: nil)
            
            }) { (_, error) -> Void in
                print(error)
        }
        
    }
    
    
    
    
    ///  打印对象信息
    override var description: String {
        
        let porperties = ["access_token","expires_in","uid","expiresDate","name","avatar_large"]
        
        return  "\(self.dictionaryWithValuesForKeys(porperties))"
    }
    
    //MARK: - 保存和加载文件
    /// 归档路径，swift中的类常量都是使用 static 来定义的
    static let accountPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true).last!.stringByAppendingPathComponent("account.plist")
    
    ///  将当前对象归档保存至沙盒 `Keyed` 键值归档/解档
    func saveAccount(){
       print(UserAccount.accountPath)
       NSKeyedArchiver.archiveRootObject(self, toFile: UserAccount.accountPath)
    
    }
    
    /// 注意：如果之前没有归档，可能会返回 nil
    class func loadAccount()-> UserAccount? {
         // 判断 token 是否已经过期，如果过期，直接返回 nil，进入登录界面
        if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(accountPath) as? UserAccount {
            // 判断日期是否过期，根当前系统时间进行`比较`，低于当前系统时间，就认为过期
            // 过期日期`大于`当前日期，结果应该是降序
          if account.expiresDate .compare(NSDate()) == NSComparisonResult.OrderedDescending{
               return account
            }
        }
        
        return nil
    }
    
    
    // MARK: - NSCoding 归档接档使用的 key 保持一致即可
    
    ///  归档，aCoder编码器，将对象转换成二进制保存在磁盘，和序列化很像
    func encodeWithCoder(aCoder: NSCoder) {
       
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        aCoder.encodeObject(expiresDate, forKey: "expiresDate")
        aCoder.encodeObject(uid, forKey: "uid")
        
        aCoder.encodeObject(name, forKey: "name")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
    }
    
    ///  解档，将保存在磁盘的二进制文件转换成对象，和反序列化很像
    required init?(coder aDecoder: NSCoder) {
        
        access_token  = aDecoder.decodeObjectForKey("access_token") as! String
        expires_in    = aDecoder.decodeDoubleForKey("expires_in")
        expiresDate   = aDecoder.decodeObjectForKey("expiresDate") as! NSDate
        uid           = aDecoder.decodeObjectForKey("uid") as! String
        
        name          = aDecoder.decodeObjectForKey("name") as? String
        avatar_large  = aDecoder.decodeObjectForKey("avatar_large") as? String
        
        
    }
    
    
}
    